Classical Mathematics One: Videos
Explanation of II.9
Explanation of II.11
II.14 – Construction Test
Please note that the problem in the guidebook contains an error. The given should include angle CDE as a right angle in addition to angle AFB being a right angle.
Please note that the problem in the guidebook contains an error. Rather than saying “Prove that CD is the mean proportional to AD, BC.” the problem should state “Prove that BD is the mean proportional to AD, BC.”